Fuel-heater.



M. J. WOHL dz A. A. LOW.

FUEL HEATER. APPLICATION FILED OGT.17.1907.

' INVENTORY ATTORNEYS Patented 0ct. 10, 1911.

UNITED STATES PATENT OFFICE.

MAURICE J'. WOHL, OF NEW YORK, AND ABBOT AUGUSTUS LOW, OF HORSESHOE,

YORK; SAID WOHL ASSIGNOR TO SAID LOW.

FUEL-HEATER. 7

Specification of Letters Patent.

Application filed ctober-,17, 19 07. Serial No. 397,913.

and Statev of New York, and Horseshoe,

- county of St. Lawrence, and State of New in elevation, cooperative"clamping members.

York, have invented a cerlainnew and useful F uel-Hea-ter, of which thefollowing is a specification.

This invention embodies means for heat- ,ing a liquid combustible priorto its admission into a vaporizer or carburetor usually associated withinternal combustion engines, although it should be understood that theinvention may be employed for heating other fluids, and that it may beused in other arts than explosive engines.

The-invention is susceptible of embodi ment in various forms ofmechanical and electrical constructions, but, stated generally, itembodies a metallic pipe, adapted to permit the flow of a liquidtherethrough, said pipe being bent for increasing the area of contactfor the combustible liquid'adapted to flow thcret-hrough, (one or more)occupying such relation to the conduit as to heat the liquid therein,and means whereby an electric current is supplied to said resistance.

In a practical form of the heater, a bent fluid carrying pipe liesbetween two electrical heater elements, the latter comprising windingsof metallic wire or ribbon coiled on insulated cores, said heaterelements being insulated electrically from metallic contact with thesaid pipe and, also, from These members are composed, preferably, ofmetallic plates which are operated by screws, or their'equivalents, forclamping the heater elements into close mechanical engagement with theinterposed pipe, for the purpose of heating the latter by the heatdeveloped in the windings on the passage of an electric current throughthe same.

In the accompanying drawin s, we have illustrated a practical embodi entof the ,mvention, but the construction shown therein is to be,understood as illustrative, ,only, and not as defining the limitsof theinvention. I Figure 1- is a longitudinal section, partly of the newliquid fuel heater in relationto a vaporizer or car- 'the plane ofsection in Fig.

an electrical resistance 'ments and the doubled bureter of an internalcombustion engine. Figs. 2 and 3 are, respectively, a side view and ahorizontal section of the liquid heater, 3 being indicated by the dottedline of Fig. 2.

The heater is adapted to be connected with a vaporizer, D, by a suitablebranch pipe, (7, whereas the pipe. A, is supplied with liquid from a.pump, tank, or other source (not shown). It is evident. however, thatthe electrically heated device may be used in connection with otherstructures than carburetors. As shown in Fig. 1, the carburcter, D,consists of an elbow, (Z, adapted to be fastened to the head, I), of anengine cylinder, said head having an intakeport, c, which is closednormally by a valve, E, the stem, 0 of said valve being operated by alever, F. The elbow of the carburetor is shown as having an air inletport, 9, the areaof which may be regulated by the adjustment of thevalve, G. The carbureter is mounted on the cylinder head to be heated bythe heat developed-in the engine during its operation, but for thepurpose of initially heating the carbureter when starting the engine, wehave ,Shown said carburetor as being provided with electrically operatedheating appliances, G, the latter forming no part of thepresentinvention.

The form of liquid heater illustrated in the drawings embodies a pipe,A, which is doubled or bent into the approximately S- shape illustratedmore particularly in Fig. 3. Said bent or doubled pipe, A, is confinedbetween two electrically operated heating elements, IT, H,.cach heatingelement consisting of a core 71. and a winding, h,

the latter being composed of a metallic wire or ribbon which is coiledon the insulated core, h. The heater elements, II, II, are applied tothe top and bottom faces of the doubled pipe, A, and between theresistance windings, It, of the two heater elepipe there are interposedlayers, h if, of insulating material. The doubled pipe H, H, are heldmechanically in close contact by clamping'plates, I, I, but theseclamping plates are insulated electrically from the resistance clampingmembers, I, I, are metallic plates which are. drawn toward each other bysuitable bolts or screws, 2', whereby the plates Patented Qct 10, 1911.

and the heater elements,

coils or windings, h, by layers, 71 of insulating material.

or members draw the heater elementsQH, H", into close contact with thedoubled metallic pipe, A.

It is preferred to employ thin layers of mice as the means forelectrically insulating each heater element from the metallic pipe andthe clamping plate, for the reason that the mica layers operateeffectually in electrically insulating the Winding, h, from the metallicparts While, at the same time, said layers permit the free transmissionof heat from the resistance winding to the doubled metallic pipe. Ifdesired, the heater shown in Figs; 3 and 4 may be incnsed Within asuitable jacket composed of a non-conductor of heat.

Having thus fully described the invention, what we claim as new, anddesire to secure by Letters Tatentis:

1. Lin :1, fuel heater, a fuel pipe adapted to supply a herdedcombustible liquid, said fuel pipe being bent for increasing the arc-uof contact for the combustible liquid adapted to flow therethrough, andan electrical resistance cooperating with said bent liquid pipe, wherebythe combustible liquid adapted to flow through said bent pipe is heated.

2. In a fuel heater, :1 fuel pipe bent for the purpose of increasing thearea of the heating surface for the liquid combustible, electricalresistances applied externally and to the respective faces of said bentpipe, metallic plates engaging with aid resistances, and means forclamping the resistance and metal plates in fixed relation to the bentor doubled pipe.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing Witnesses.

MAURICE J. WOHL. ABBOT AUG hTUS LOW. lVitnesses M. A. WARREN, Geo. llnurse Gmnmcs.

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